TM 1-1520-238-23
Change 8
6-432.1/(6-432.2 blank)
6.97.
MAIN ROTOR SUPPORT MAST REMOVAL/INSTALLATION – continued
h. Apply sealing compound to exposed threads
of 18 bolts (5). Use sealing compound (item 177,
App F).
WARNING
FLIGHT SAFETY PART
Conductivity between the mast and
support is a flight safety part critical
characteristic.
i. Perform electrical bond check between mast
(2) and support (4) (TM 55-1500-323-24).
(1) Bond shall be 0.005 OHM or less. Use
ohmmeter.
(2) If resistance exceeds 0.005 OHM, replace
spacer plate (12) (para 6.98).
j. Apply sealing compound to base of mast (2).
Use sealing compound (item 177, App F).
k. Remove hook (3) of crane from lifting eye (1).
l. Remove lifting eye (1) from mast (2).
m. Inspect (QA).
n. Install swashplate (para 11.7).
o. Install main rotor head (para 5.21).
p. Install main rotor gearshaft (para 6.95).
q. Remove maintenance crane (para 1.105).
END OF TASK
M04-520-7
4
5
2
M04-520-6
3
1
2
4
5
5
SEALANT
12
SEALANT
